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A machining error analysis method based on installation error extraction and correction

A technology of installation error and analysis method, applied in measurement devices, instruments, geometric CAD and other directions, can solve the problems of not reflecting the worm machining error, installation and alignment is cumbersome, etc. effect of error

Active Publication Date: 2021-08-13
XI AN JIAOTONG UNIV +1
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Problems solved by technology

In the detection of worms, for worms without top and bottom holes, the installation and alignment are usually cumbersome, and there is still a large space for tilting and deflection between the aligned worm and the axis of rotation of the measuring machine, and the final measurement results are affected by the clamping of the worm. influence, and cannot reflect the real machining error of the worm

Method used

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  • A machining error analysis method based on installation error extraction and correction
  • A machining error analysis method based on installation error extraction and correction
  • A machining error analysis method based on installation error extraction and correction

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] For the worm without upper and lower tops and the machining error measurement that has a large deviation between the axis of the worm and the axis of rotation of the measuring platform after the top is clamped, if the installation error is not corrected, and the measurement results are used as the basis for judging whether the worm is qualified, Since the installation error is not eliminated, the measurement result of the qualified worm will be poor, and it will be misjudged as a waste product. The above problems also exist in the analysis of machining errors of other workpieces similar to worms (such as rotary workpieces). For this reason, the present invention firstly proposes a worm screw eccentricity and tilt installation error extraction and correction method based on a four-axis measurement center, including the following steps, see Fig...

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Abstract

The invention provides a workpiece processing error analysis method based on installation error extraction and correction. The method is based on the four-axis linkage measurement platform, establishes its mathematical model according to the workpiece parameters, and collects the measurement data of the workpiece by following the trajectory path planning; obtains the installation error of the workpiece installation reference relative to the rotary axis of the measurement platform, and analyzes the workpiece based on the principle of coordinate change. The installation error matrix is ​​used to quantify the installation error; the measurement data collected in the machine coordinate system is transformed into the workpiece coordinate system after installation error compensation, and the installation error correction is completed; the optimal matching with the mathematical model is carried out to eliminate the system error; using the matching Error analysis is performed on the final data to improve the accuracy of error analysis.

Description

technical field [0001] The invention belongs to the field of precision measurement of complex shapes, and in particular relates to a method for extracting and correcting worm eccentricity and inclination installation errors based on a four-axis measurement center. Background technique [0002] The worm plays an important role in the transmission system, and has the excellent characteristics of compact structure, stable, low noise and large transmission ratio. In the detection of worms, for worms without top and bottom holes, the installation and alignment are usually cumbersome, and there is still a large space for tilting and deflection between the aligned worm and the axis of rotation of the measuring machine, and the final measurement results are affected by the clamping of the worm. The influence cannot reflect the real machining error of the worm. Therefore, minimizing the influence of installation errors in the measurement process can reflect the real processing quali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G01B21/00G01B21/20G06F111/10
CPCG01B21/00G01B21/20G06F30/17G06F30/20G06F2111/10
Inventor 丁建军蔡磊刘阳鹏王震李兵蒋庄德赵威
Owner XI AN JIAOTONG UNIV
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